rarefaction

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Related to rarefactions: compressions

rar·e·fac·tion

 (râr′ə-făk′shən)
n.
1. The condition of being rarefied.
2.
a. A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave.
b. The region in which this occurs.

rar′e·fac′tive adj.

rarefaction

(ˌrɛərɪˈfækʃən) or

rarefication

n
the act or process of making less dense or the state of being less dense
ˌrareˈfactional, ˌrarefiˈcational, ˌrareˈfactive adj

rar•e•fac•tion

(ˌrɛər əˈfæk ʃən)

n.
1. the act or process of rarefying.
2. the state of being rarefied.
rar`e•fac′tion•al, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rarefaction - a decrease in the density of something; "a sound wave causes periodic rarefactions in its medium"
concentration - increase in density
Translations
rarefação

rarefaction

[ˌrɛərɪˈfækʃən] Nrarefacción f

rarefaction

nDünne f; (fig)Exklusivität f
References in classic literature ?
For some days past, Captain Bonneville had been made sensible of the great elevation of country into which he was gradually ascending by the effect of the dryness and rarefaction of the atmosphere upon his wagons.
Ultrasonic waves are longitudinal mechanical waves that travel as a sequence of compressions and rarefactions and they have the property of propagating along the same direction as that of the wave propagating through the medium.
However, in adults, multilocular rarefactions become sclerotic with progressive calcification.